Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1987-03-18
1988-12-20
Salce, Patrick R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310162, 310185, H02K 3704
Patent
active
047927097
ABSTRACT:
A three-phase stepping motor having magnetically interacting stationary and moving members, the stationary member having first, second, and third sets of stator poles, each stator pole having thereon a coil for magnetic energization thereof. The coils on the first set of stator poles and one-half of the coils on the third set of stator poles are connected to one phase of a two-phase drive. The coils on the second set of stator poles and the other half of the coils on the third set of stator poles are connected to the other phase of a two-phase drive. The fluxes produced by the currents of the two drive phases are, in effect, magnetically combined in the moving member, as if the third set of poles wewre energized by a "third phase". In one embodiment, a twelve-pole, rotary, three-phase stepping motor with a 50-tooth rotor and a 48-, 50-, 52-, or variable-tooth-pitch stator produces a step angle of 1.8.degree. mechanical with a two-phase drive.
REFERENCES:
patent: 3117268 (1964-01-01), Madsen
patent: 4025810 (1977-05-01), Field
patent: 4029977 (1977-06-01), Chai et al.
patent: 4516048 (1985-05-01), Brigham
Horst Gary E.
Smith Robert C.
Crozier John H.
Rebsch D. L.
Salce Patrick R.
The Superior Electric Company
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